West Indies swept the three-match series against South Africa to conclude their T20 World Cup preparations in the most commanding way possible before the tournament starts next week. South Africa, on the other hand, have won just two of their last 11 completed T20I matches since the last T20 World Cup and have lost series to West Indies twice and Australia once, and enter the global competition on the back foot. If there's any consolation, it's that none of South Africa's powerhouse middle order of Aiden Markram, Heinrich Klaasen, David Miller and Tristan Stubbs were part of this series, but all will return for the World Cup. Still, there remain concerns over Quinton de Kock, who scored 64 runs in three innings and had a poor BBL, SA20 and IPL, while also appearing to pick up a back injury on Sunday; and Ryan Rickelton, who managed only 43 runs in three innings. Equally, Anrich Nortje's economy rate of 12.16 through the series and the absence of any wickets to his name raises questions over his readiness for international cricket after an almost nine-month absence as he recovered from a lower-back stress fracture. But he is part of South Africa's final squad for the World Cup, as they travel to the United States for their opening matches. West Indies head to Trinidad to play Australia in a warm-up match before their first World Cup match in Guyana, and they appear as ready as they can be. They've won four out of five series since the last T20 World Cup, and beat South Africa 3-0 for the first time in this one. After defending totals of 175 and 207 to win the series, they were made to chase and hunted down 164 inside 14 overs to ease past South Africa again. Obed McCoy, added to the T20 World Cup squad in the place of the injured Jason Holder, was the most successful bowler in the final match with 3 for 39, while stand-in captain Brandon King finished as the series' leading run-scorer and captained the team to victory on his home ground Sabina Park, which will not see any T20 World Cup action. The redemption of Johnson Charles   It was against South Africa, 15 months ago, that Johnson Charles made the case to reclaim his spot in the T20I squad with 118 off just 46 balls in a T20I in Centurion. But since then, it has been lean going for him. Charles went ten innings without crossing fifty, and questions over his T20 World Cup-squad involvement were more than just whispers.   But he silenced those questions with a knock of complete assurance and authority to bring up his fifth T20I half-century, and set the platform for another West Indies win. Charles' takedown of South Africa's fastest, Nortje and Gerald Coetzee, was most impressive. He scored 25 runs off just ten balls from Nortje, and 22 off four from Coetzee, including three successive sixes. Only three of his 69 runs came in singles, with 66 in boundaries, and even though he was dismissed in the seventh over, he had already put the result beyond doubt. Motie makes the most of it After taking three wickets in each of his last three games, left-arm spinner Gudakesh Motie seemed set for a similar haul after two exceptional overs. He was brought on immediately after the powerplay, and displayed good changes of pace to have de Kock trapped lbw, as the latter played a reverse sweep too early and was given out. In Motie's next over, Matthew Breetzke hit the ball back over the bowler's head. It looked like a clean strike but wasn't timed as well as he intended, and Shamar Joseph took a good catch inside the boundary rope to end a disappointing tour for the CSA T20's top run-scorer for the 2023-24 season. Motie's figures after two overs were 2 for 5, but his day didn't finish as well as he hoped. He conceded 11 runs off his final over, as Rassie van der Dussen hit him for two sixes and he wasn't used again.